baber/WOPTO huggingface dataset:
Patent GB-590015-A (GB)
Title: Production of unsaturated carboxylic acids and esters containing fluorine and polymers thereof
IPC: C08F20/22
Filed: 1945-04-09
Abstract: Alpha-fluoroacrylic acid alkyl esters are prepared by reacting with nascent hydrogen an alkyl ester of a fluorodihalopropionic acid of the type CH2.X1.CX11F.COOH, where X1 and X11 represent halogens other than fluorine and may be the same or different.  Alpha-fluoroacrylic acid is obtained from the esters by acid or alkaline hydrolysis.  The nascent hydrogen employed is produced in situ, suitably by the action of a dilute mineral acid or aliphatic alcohol having up to 5 carbon atoms on a finely-divided metal such as zinc; the reaction is preferably carried out at such a temperature that the fluoroacrylate distils off as it is formed.  The fluorodihalopropionates are prepared by reacting with thorough mixing a metal fluoride fluorinating agent with a tri-halopropionate of the type CH2X.CX2.COOR, where R is an alkyl radical and X a halogen other than fluorine, the halogens being the same or different; the trihalopropionates themselves may be prepared by the addition of halogen to chloro-acrylates.  The acid and its esters and the above-mentioned fluoro dihalopropionates are stated to be novel compounds. Alphafluoroacrylic acid and its alkyl esters may be polymerized by means of heat, ultra-violet light or a polymerization catalyst yielding clear colourless solids having lower refractive indices than the corresponding methacrylates.  In an example, methyl-1-chloro-1.2-dibromo propionate, prepared by reacting bromine with methyl alpha-chloroacrylate, is heated with mercuric fluoride (or antimony fluoride) and the distillate of crude methyl - 1 - fluoro - 1 - chloro - 2 - bromo - propionate after redistillation is added to a well-stirred heated mixture of zinc dust in dilute aqueous sulphuric acid and the resulting methyl alpha-fluoroacrylate distilled off with water as formed; the ester, dried and redistilled, is polymerized by means of ultra-violet light.  Specification 514,619 is referred to.
Patent GB-526522-A (GB)
Title: Improvements in or relating to hoists
IPC: B66C23/20
Filed: 1939-03-18
Abstract: 526,522. Cranes carried by scaffolding. TRIGGS, W. W. (Safway Steel Scaffolds Co., of America). March 18, 1939, No. 8733. [Class 78 (iv)] The tubular or solid crane post 26 fits into the upper end of the scaffold tube 15 and slues therein. An .upper fixed guide sleeve 37 is connected by a pair of diverging brace rods 35 to a horizontal angle-iron 42 which is connected bv hooked bolts to a scaffold member 16. A further brace 45 connects the member 42 to the lowest guide sleeve. The crane post is formed with a goose-neck braced at 31 and is fitted with a pulley 30 over which the load-rope passes to a guide sleeve in the circular mounting 75 and thence to a winch 56 mounted on the brace rods 35. The intermediate brace bars Y, connecting the members 35 to a third sleeve on the post, may be utilized to support a motor when the winch is driven by power instead of by the handle 55. Guard-rails 19 for the scaffold platform fit into the upper ends of the scaffold tubes and have a sleeved connection to the crane post. The winch carries a brake drum at one end and ratchet retaining mechanism at the other end.
Patent GB-816262-A (GB)
Title: Improvements relating to domestic fireplaces
IPC: F24B1/19
Filed: 1957-03-18
Abstract: 816,262. Open fireplaces. BAXENDALE, R., BAXENDALE, J., BAXENDALE, P. S., and CASELTON, M. J. March 6, 1958 [March 18, 1957], No. 8768/57. Class 126 A shaft b extends below the grate a of an underfloor ventilated fireplace to an ashpit c from which the ashes d are removed through an air tight door e located in either an outer wall f or a cellar. Combustion air is introduced into the upper part of the shaft past a control valve h operated by a handle i by a pipe g which may extend outside the building.
Patent GB-918408-A (GB)
Title: Esters of 21-hydroxy steroids and process for preparation
IPC: C07J75/00
Filed: 1961-03-10
Abstract: 21-Esters of 21-hydroxylated 16,17-cis-dihydroxy steroids are obtained by treating a 16,17,21-trihydroxy steroid with boric oxide or a derivative thereof to form the 16,17-borate, and with an esterifying agent, preferably an acyl halide or an acid anhydride, to form the 21-ester, and then regenerating the 16,17-dihydroxy group. Suitably boric acid or an alkali metal borate may be used. Esterification may be effected with acetic or succinic anhydride, or with t-butyl acetyl chloride.
Patent GB-321899-A (GB)
Title: Improvements in and relating to centrifugal mixing machines for sand and the like
IPC: B22C5/02
Filed: 1929-03-19
Abstract: 321,899. Samm, G. March 19, 1929. Mixing machines; apparatus for spreading solids.-A machine for mixing sand has a rotary hollow body comprising a plain wall f and an annular wall g, the body being divided into compartments by radial ribs. The shaft e is arranged vertically in the modification shown in Fig. 1 and the driving motor q is supported on the motor framework carried by the bracket c. An annular sheet o of iron is arranged round the rotary body, and its position is adjustable vertically by means of screws p bearing on the cover plate b. Sand to be mixed is introduced into the hopper n and distributed by the action of the pins m on the wall f so that it passes into the compartments of the rotary body where it is mixed. 'The mixing action is assisted by the sand being thrown against the annular sheet o from which it drops into receptacles below. In the modification shown in Fig. 4, the rotary body is carried by a horizontal shaft and the annular wall g is bell shaped. This wall also carries paddles u to produce an air current tending to throw the sand out from the annular sheet o.
Patent GB-216623-A (GB)
Title: Improvements in and relating to trolley poles and standards in overhead wire systemsof electric traction
IPC: B60L5/04
Filed: 1923-03-28
Abstract: 216,623. Merrick, C. W. March 28, 1923. Releasing-devices for collectors.-In a trolly pole held in position by springs 3, Figs. 1 and 2, surrounding horizontal tubes 2 and arranged between cross-heads 1, 5, the front ends of the tubes carry a bracket 6 supporting a shaft 7 which is formed with a cam 19 adapted, when the trolly pole leaves the wire, to engage a locking bar 18, whereby the springs 3 are released sufficiently to allow the pole to come to rest below the wires. The locking bar is pivoted at its rear end to a transverse pin 16 secured to the cross-head 1 and at its front end is formed with a slot 20 of the form shown, which is adapted to be engaged by a pin 22 on the bracket 6. The shaft 7 is formed with forked lugs 12, 13, the former being pivotally connected to pullrods 14 located within the guide tubes 2 and formed with slots 15, through which and through slots 17 in the tubes 2 the pin 16 extends. The lugs 13 are connected by rods 28 to links 25 slidably mounted between stops 26, 27 on rods 23 connecting the trolly pole to the cross-head 5. Forward movement of this cross-head is prevented by nuts 11. When the trolly pole leaves the wire the initial upward movement of the pole causes a partial rotation of the shaft 7, thereby forcing the pull-rods 14 rearwards to the end of the slots 15. At the same time the locking bar 18 is forced upwards by the cam 19 and then moved rearwardly by the springs 3 until the pin 22 lies in the forward end of the slot 20. The trolly pole is reset by being drawn down below the locking position whereby the shaft 7 is partially rotated to draw forward the pull-rods 14, thereby pulling the locking bar 18 and the crosshead 1 into normal position. In a modified construction the nuts 11 are replaced by a U-shaped stop member 32, Fig. 4, arranged astride the locking bar 18 and bearing in front against a transverse pin secured to the guide tubes 2. The limbs of the stop member are connected by a bolt 33. The rods operating the shaft 7 are passed loosely through the cross-head 5 and are provided with chamfered nuts 30, 31 one on each side of the cross-head.
Patent GB-831372-A (GB)
Title: Austenitic alloy steels
Inventor: LOVELESS DONALD LEONARD
IPC: C22C38/00
Filed: 1958-03-20
Abstract: An alloy steel having high strength at elevated temperatures and good ductility when hot worked has the following composition in percentages by weight:  .Cr.12.0-30.0 .Mn.4.0-20.0 .N.0.06-0.6 .B.0.00005-0.005 .Ni.0-35.0 .C.0-1.5 .Mo.0-9.0 .Co.0-20.0 .S.0-0.3 .Fe.the remainder  In particular examples the presence of Si up to 0.25 is also referred to.
Patent GB-700471-A (GB)
Title: Improvements in or relating to spring operated percussive tools
IPC: B25D9/08
Filed: 1951-04-17
Abstract: 700,471. Percussive drills. PRIESS, H. April 17, 1951, No. 8944/51. Class 124 The hammer blow in a spring operated percussive tool is produced by the convolutions of a tension spring striking one another. As shown a spring 14 fixed at one end in a piston 15, has at its other end a piston 18 sliding in a cylinder forming part of a housing 10. A valve 24 admits compressed air through a port 28 below the piston which moves upwards and puts the spring 14 under tension. A rod 21. passing through the top of the cylinder and having a return spring 19 and a plate 22 on its upper end rises with the piston 18 and moves the valve upward, cutting off the air supply and opening an exhaust port 30 releasing the tension on the spring which causes the piston 15 which has a small movement to strike a blow on the steel 12. A rod, pivoted in the valve 24, has one end in the space above the plate 22 and the other end connected by an adjustable rod to the operating handle 33, and by adjustment of the rod the point at which air is cut off, and hence the power of the blow, may be varied, Fig. 2 (not shown). A pin 17 holding the piston 16 may be removed when operation of the piston 18 will produce a blow in the upward direction.
Patent GB-733574-A (GB)
Title: Improvements in fluid-pressure relays
IPC: F15B5/00
Filed: 1953-03-31
Abstract: 733,574. Fluid-pressure servomotors; valves. SAMSON APPARATEBAU AKT.-GES. March 31, 1953 [April 5, 1952], No. 8948/53 Class 135. A fluid-pressure relay for producing a control pressure which may be applied, for example, to a diaphragm-actuated valve or a measuring instrument consists of inlet and outlet nozzles 7, 8 in the wall of a pressure chamber 5, and closure members 11, 12 urged by a spring 16, Fig. 1, or 28, Fig. 5, into engagement with the nozzles, deflection of a member carrying the closure members resulting in that member tilting about one nozzle to open the other. According to Fig. 1, the closure members are adjustably carried by a U-shaped member 13 which is located laterally with respect to the nozzles by a leaf spring 17 fixed to a pin 15 and is arranged to be tilted by a spring-link connection 18 with a U-shaped lever 19 spanning a recess 4 in the base of the chamber 5 and secured to the ends of shaft 20 which extends on either side of the recess 4. Fixed to the shaft 20 within the recess 4 is a lever 23 actuated by a pressureresponsive diaphragm 30. The ratio between the levers 19, 13 may be varied by using members 26 of different lengths. The member 13 may be T-shaped, instead of U-shaped, or, as shown in Fig. 5, may be a straight member connected directly to the U-shaped lever 19. The pressure-responsive diaphragm of the relay may be subject to the outlet pressure of a pressure-regulating valve and the chamber 5 connected to a diaphragm which operates the pressure-regulating valve. Alternatively, as shown in Fig. 9, the diaphragm of the relay may be subject to a constant pressure derived from a conduit 32 and may have connection through a spring 49 and lever 48 with the movable member of a controlled valve whereby the latter is maintained in a required position despite variations of pressure acting on its valve proper 38. The relay may be responsive to temperature or liquid level instead of pressure or may be operated by an electromagnet.
Patent GB-195638-A (GB)
IPC: F01K15/02
Filed: 1923-03-29
Abstract: 195,638. Leidenroth, G. April 1, 1922, [Convention date]. Cooling condensers, air blast for. -Steam from the dome a<1> of the main boiler A is used in the turbine B which drives the blower of the condensing-plant, and the exhaust passes either by the pipe D to the train pipe or by the pipe E, augmented by steam from the supplementary boiler H, to the turbine F and condenser G. The Specification as open to inspection under Sect, 91 (3) (a) states also that in a modification, the dome a<1> delivers steam direct to the train pipe while the boiler H supplies the steam for the turbine B, and makes good the loss of feed-water due to leakage, &c. This subject-matter does not appear in the Specification as accepted.
Patent GB-781513-A (GB)
Title: Multi-stage gas-scrubbing process and apparatus
IPC: C10K1/18
Filed: 1955-03-29
Abstract: 781,513. Contacting gases with liquids. DIDIER-KOGAG-HINSELMANN GES. March 29, 1955 [April 2, 1954], No. 9067/55. Class 55 (2). In a multi-stage gas scrubbing process such as for removing hydrocarbons, using recirculation of the scrubbing liquor, more substantial recirculation of the liquor is effected in the scrubbing stages at which there are high concentrations of the gas to be removed than in the subsequent stages and the liquor is directed into a direct flow scrubber in the last stage or stages of scrubbing. As shown, two multi-stage scrubbers 9, 10 each have four scrubbing stages 11- 14 and 15-18, the liquor collecting on an intermediate plate 20 between stages. A pump 19 feeds the scrubbing liquor to the last stage 18 and after passing through stages 18, 17, 16, 15, in direct flow the liquor is fed by pump 21 to stage 14 of the scrubber 9. The liquid is recirculated at each stage by pumps 22-25 and may if necessary be cooled by heat-exchangers 26-28 fed with cooling water. The recirculation of the liquor may be four-fold or five-fold in stage 11.
Patent GB-357497-A (GB)
Title: Improvements in or relating to apparatus for signalling, advertising and like purposes
IPC: G09F19/14
Filed: 1930-03-21
Abstract: 357,497. Changing signs. JOURDAIN, J. A. D., 30, Rue du Fardeau, Rouen, France. -(Assignee of Menager, A. ; 177, Rue de Paris, St. Etienne du Rouvray, Seine Inferieure, France.) March 21, 1930, No. 9085. Convention date, March 22, 1929. Void [Published under Sect. 91 of the Acts]. [Class 3 (i).] A sign or a signalling, advertising, or decorating device comprises a plurality of parallel prismatic elements the homologous faces of which are provided with parts of designs &c., a whole composite design being seen from any one viewpoint, but different designs being seen from other points, or alternatively the composite design changing as viewed from any ona position. The prismatic elements may be arranged vertically or horizontally, and may be rotated in unison by manuallyoperated worm gearing. Fig. 12 shows elements 2 automatically or otherwise slidable in a frame 1 which may be extensible. Fig. 18 shows display strips 2 rotatable or adjustable in a longitudinal groove in the frame 1. The elements 2 may have re-entrant angles, as shown in Fig. 16, or may be of glass and be internally illuminated. The designs &c. may be in the form of coloured or other reflectors, or may be constituted by electric discharge lamps 13, Fig. 14. Letters forming designs may be given an increasing height along the sign to compensate for perspective.
Patent GB-1529902-A (GB)
Title: Enteric capsules
IPC: A61K9/62
Filed: 1976-04-15
Abstract: 1529902 Enteric capsule PARKE DAVIS & CO 15 April 1976 [17 April 1975] 09088/78 Divided out of 1529901 Heading B8C An untanned, hard shell pharmaceutical capsule comprises telescopically engageable body and cap portions which have enteric properties and which are formed from a homogeneous composition comprising (1) hydroxypropyl methyl cellulose and (2) an ammonium salt of (a) cellulose acetate phthalate, (b) hydroxy propyl methylcellulose phthalate or (c) a copolymer of methacrylic acid and a methacrylic acid ester. The composition may also contain glycerine and a colouring agent.
Patent GB-408800-A (GB)
Title: Improvements in stuffing-box or like packings
IPC: F16J15/20
Filed: 1933-03-28
Abstract: 408,800. Stuffing - box packing. WYNDHAM, T. S., Nythfa, Llantwit Major, and TUCK, A. W., 1, Despenser Gardens, Cardiff, both in Glamorgan. March 28, 1933, No. 9266. Drawings to Specification. [Class 122 (v).] A stuffing-box packing comprises a number of plywood rings between which are interposed layers of resilient packing material. The rings are split and the ends twisted to facilitate positioning around the rod &c.
Patent GB-736953-A (GB)
Title: Improvements in or relating to organosilicon modified alkyd resins
Inventor: PHILLIPS LESLIE NATHAN
IPC: C08G77/00
Filed: 1951-04-20
Abstract: A synthetic resin is made from an acid reactant comprising succinic and sebacic acids in molar proportions in the range of 4 : 1 to 1 : 9, and an organosilicon compound, containing at least 3 hydroxy groups, which is (a) a silanol of the formula RSi(OH)3, where R is a monovalent hydrocarbon radical, (b) a reaction product of (a) and a polyhydric alcohol, (c) a reaction product of a silanol of the formula R2Si(OH)2 and a polyhydric alcohol, (d) a reaction product of (a) and (c), (e) a silicone obtained by condensation of either of the silanols set forth at (a) and (c), (f) a reaction product (e) with a polyhydric alcohol, or (g) a silicone-fatty acid-polyhydric alcohol reaction product made from a siloxane containing at least two reactive methoxy groups, the sum of the reactive groups of a mol. of the siloxane and a mol. of the polyhydric alcohol being at least five. Where used, the polyhydric alcohol preferably contains 3 OH groups, e.g. glycerol or trimethylolpropane, and is desirably used in a molar proportion to the total acid content of the reactants of 1 : 1 to 5 : 3.  Additional polyhydric alcohol may be mixed with the reaction product (g), and phthalic anhydride may be added to the acid reactants in a molar amount of not more than 1 : 2 1/2 of the total acid content.  The silanol or silicone component of the organosilicon compound used is preferably in the range of 20 to 90 parts (by weight) per 100 parts of the whole synthetic resin-forming mixture. Reaction is preferably effected at 150 DEG  to 220 DEG  C.  The resins thus produced may be further modified by reaction with a polyisocyanate, preferably a diisocyanate, in amount of 30 to 100 parts (by weight) per 100 parts of the resin.  In examples I to III a mixture of sebacic and succinic acids, phthalic anhydride, glycerol and the reaction product of dimethyltriphenyltrisiloxane, glycerol, 12 - hydroxystearic acid and 2-ethylbenzoic acid, were reacted at 185 DEG  C. in an atmosphere of nitrogen, and the resulting viscous liquid was further reacted with the pure or a toluene solution of m-toluylene diisocyanate, either in the cold or by heating up to 60 DEG  C.  Different polyurethane products obtained are (a) an expanded foam, (b) an adhesive or resin syrup which will cure with limited foaming, and (c) an adhesive or lacquer which does not foam. Finely-divided fillers, such as zinc oxide, chromic oxide, china clay and flowers of sulphurs, may be incorporated in the foamed products. Products (a) can be used as the core layer of a sandwich structure for use in aircraft, products (b) for joining pieces of metal as in making metal-honeycomb cores, and products (c) as adhesives and varnishes possessing weather-resistant and electrical insulating properties.
Patent GB-875166-A (GB)
Title: Improvements in and relating to electrical control circuits for controlling the intensity of a light source
IPC: H05B39/08
Filed: 1958-03-24
Abstract: 875,166. Automatic light-intensity control systems. INTERNATIONAL BUSINESS MACHINES CORPORATION. March 24, 1958 [March 28, 1957], No. 9353/58. Class 38 (4). In a system in which the intensity of a light source is automatically controlled by a variable impedance in the supply circuit controlled by the amplified output of an element sensitive to the light intensity, an indicating device is switched on when the amplifier output exceeds a predetermined value. In Fig. 2 light from a lamp 34 is projected through a letter chart (not shown) on to the photo-emissive cathode of an electron image tube (also not shown) which selects letters to be displayed and photographed in high-speed printing. Deviations in the intensity of illumination e.g. due to ageing of the lamp, dust on the optical components, or ageing of the photo-emissive cathode are automatically corrected by utilizing variations in the cathode current of the electron image tube, which passes through a resistor 17, to control, through differential valve amplifiers T, T 1 , T 2  and a saturable reactor 30, the direct-current supply to lamp 34 derived from an A.C. source 32, 33 through a rectifier R. The intensity of illumination maintained by the system is determined by the setting of a potentiometer P. When the correction effected by the system exceeds a predetermined amount, indicating that lamp ageing has passed a predetermined limit, the signal applied through a rectifier 36 is effective to change the state of a circuit including valves T 3 , T 4 , T  5  which is bi-stable by virtue of positive feedback through a rectifier 40. A neon 41 is illuminated to indicate this condition. Resetting of the bi-stable circuit is effected by applying a pulse through a rectifier 42.
Patent GB-479809-A (GB)
Title: Improvements in or relating to wood blocks or tiles for flooring and other surfaces
IPC: E04F15/04
Filed: 1937-04-02
Abstract: 479,809. Floors ; tiles. DUGDALL, J. C., and HOLMS BROS. & CO., Ltd. April 2, 1937, No. 9357. [Classes 20 (iv) and 87 (i)] A flooring or paving surface is formed of composite tiles each comprising two or more wooden strips 10, 11 separated by a rubber or cork strip 12, the outer edges of the strips being formed to interlock. A tongue 13 is formed on one edge of the strip 10 and grooves are formed on all other edges of the strips 10, 11, 12 except the abutting surfaces of the strips which are flat. Loose tongues are inserted where two grooves abut in laying. The tiles may be laid in herringbone fashion.
Patent GB-682269-A (GB)
Title: Improvements relating to the erection of plate structures prior to welding
Inventor: SLATER REGINALD
IPC: B23K37/04
Filed: 1950-04-17
Abstract: 682,269. Uniting by fusion. WHESSOE, Ltd. July 17, 1951 [April 17, 1950], No. 9372/50. Class 83 (iv). Means for clamping plates 4, 5 to be welded comprises a bridge-piece 6 having a pair of apertured legs welded to the plate 4 and a similar bridge 7 welded to the plate 5, a key plate 8 having stops 8b, 8c, 8d and passing between the bridges 6, 7 and the plates 4, 5 with the stops 8b, 8d outside and the stop 8c between the bridges 6, 7, wedge members 9, 10 driven through the apertures in the bridges 6, 7, respectively, to force the plate 8 against the plates 4, 5 and a pair of wedge-members 11, 12 to be driven either between the bridges 6, 7 and stops 8b, 8d or between the pieces 6, 7 and the stop 8c to force the plates 4, 5 together or apart. The key-plate 8 is formed by a plate 8a with rectangular blocks welded thereto. The bridges 6, 7 are welded to the plates 4, 5 before erection and with the plates 4, 5 in approximate position the plate 8 is placed in position and held against the plates 4, 5 by the wedges 9, 10. Shim plates 13 having elongated apertures are placed between the edges of the plates 4, 5 and wedges 14 are passed through the apertures on opposite sides of the plates 4, 5. The wedges 11, 12 are driven until the gap between the plates 4, 5 is equal to the thickness of the shims 13, when the wedges 9, 10 are driven fully home. The wedges are knocked out after welding and the bridges 6, 7 are removed by burning, chipping, &c. An angular or hinged key-plate may be used for the welding of corner plates.